Pulley-molding machine



(No Model.) 2 Sheets-Sheet 1 J. G. MGDERMOTT. PULLEY MOLDING MACHINE.

`QNo. 411,390, Patented Sept. 1'7, 1889.

EMM

(No Model.) 2 Sheets-Sheet 2.

J. e.r MQDERMOTT. PULLEY MOLDING MACHINE.

N0. 411,390. Patented Sept. 17, l1889.

v @44mm/M201.

g mm

. a mold much quicker than can be made in the my improved pulley-moldingmachine.

f UNITED STATES? PATENT --OEEICE JAMESC. IWICDERMOTT, OF CHICAGO,ILLINOIS.

' PuLLEY-MOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 411,390, datedSeptember 17, 1889.

. Application ined August s, 188e.

To all whom it may concern:

Be it known that I, JAMES C. MGDERMOTT, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Pulley-Molding Machines, of 'which the following is afull, clear, and exact description, reference being had to theaccompanying drawings and the letters of reference marked thereon.

Heretofore pulley-molding machines have been made which enablefoundrymen to make usual and common flask; but even these machines canbe improved by dispensing with the manual labor involved in packing ortamping the sand around the pattern and substituting some automaticmechanical action therefor. This it is the object of my invention to do,and this I accomplish thoroughly and quickly by the means hereinafterfully explained, andas illustrated in the drawings, in which- Figure 1is a transverse vertical section of Fig. 2 is a horizontal transversesection taken on line 0c, Fig. l. Fig. 3 is a diagram showing in sideelevation the arrangement and location of the actuating-gear of myimproved machine with the remaining structure omitted or broken away.Fig. 4 is a front elevation of the same. v

Referring to the drawings, A A and A A I represent four verticalpillars, which are secured to and arise from a suitable baselplate, andwhich support a circular plate B. This circular plate B has a largecircular opening in it, whose edges are rabbeted so as to provide a seatfor the lateral anges projecting from the upper edges of the ring C.lThe basal flange of the flask D rests concentrically upon the uppersurface of the plate B and ring C, and between the inner verticalsurface of ring C and the rim-pattern a is an annulus b. The rim-patterna is perfectly concentric with the annulus h, and fits snugly againstthe inner edge of the same. Inside the ri'mfpattern and concentrictherewithis a circular platee, which has a circular opening initsfcenters through which the cap CZ projects. This plate c is supportedby flanges d', projecting laterally from the lower edges of said cap,which project in the same man- .ner as the rim of a hat.

Serial No. 282,280. (No model.)

The upper surface of said annulus ZJ and plate c are always in the sameplane. Secured to the cap d concentrically with the rim-pattern a, bymeans `of a vertical screw e', is the pattern e for the arms of thepulley and E represents the bosspattern, which is dropped over the screwe', `which centers it.

The arms of the pattern may be of any suitable number, are an equaldistance apart, and terminate at a point where they bear against therim-pattern.

In arranging the patterns for the rim, the arms, and the boss, the rimis pushed up into the flask from below a distance from and above theplane e corresponding to one-half the width of the rim of the pulley tobe cast plus the extent of compressibility of the sand. The armpatternis then placed and secured `concentrically within said rim-pattern, withthe end of each arm bearing against the inner surface of the sand. Thedesired size of boss-pattern is then centered on the head of the screwwhich secures the arm -pattern down. This being done, the flask isfilled with moldingsand, I'Ieretofore sand has been packed by hand witha suitable beater or tamping device. top of thel flask by asuitable'cover F, which is held securely in place by the vertical boltsf f, (which latter are secured in and arise from the circular plate 13,)passing through it, and by nuts ff, as shown. When the cover F is thussecured over the flask and the patterns are properly adjusted, theannulus and plate c are automatically moved upward by mechanism whichwill hereinafter be fully described, and which compresses or packs thesand thoroughly and rapidly.

' In` order to accomplish the packing movement of the annulus andcircular plate c, I place the cap d over the upper open end of a sleeveGr, which sleeve extends down a suitable distance and surrounds thecylindrical central post g. The lower end of the sleeve is provided witha wide lateral flange G', which has lugs arising from near itscircumference, ,at regular intervals apart, to which are pivoted thelower ends of the arms II H. These arms pass upward outside of therimpattern and between the same and the ring C, .n and enter suitablesockets made in the under surface of the annulus. Thus when said sleeveI avoid this labor by closing the is raised, so as to obtain'the packingmovement of plate c, the annulus is raised also at' the same time. Inorder to accomplish this verti cal movement, I make a vertical slot hinthe post g, below the said sleeve G, and place therein the bearing-blockt' of the shaft I. This shaftIhas eccentric gear-wheels .I on its ends,which latter terminate on either side of said post, and thesegear-wheels engage with corresponding eccentric gear-wheels lo 7c on theshaft K. Shaft K is properly journaled in said post and in the pillars AA, and is driven, through the medium of a large gear K and idle-gears LL', by the pinion N on the drive-shaft M. As shaft K revolves, the shaftI is carried up and down by the action of the eccentric gear-wheels, andthrough the medium of a collar I', which surrounds the post and restsupon the projecting ends of the bearing-box of shaft I, the sleeve G,plate c, and annulus b are pushed upward to pack the sand in the ask.

The depth of sand to be packedin the flask varies according to the sizeof the pulley desired to be made. When a small pulley is to be made, thedepth of sand is less than when a large pulley is to be made. Itherefore have to make allowances for this dierence. This I accomplishby a lever m, which is fulcrumed in a suitable bracket n, which issecured tov I and projects inward from one of the side pillars A. Theinner end of this lever is bifurcated, so as` to pass equally to eitherside of post g, and the ends of the bifurcations are upturned and bearagainst and support the flange G' of sleeve G at points diametricallyopposite each other. This lever is operated to raise the said sleeve agiven distance, thus raising the annulus b and circular plate c to ahigher plane. The patterns are then arranged and adjusted and the flaskfilled with sand. The collar I', as it is carried upward by shaft I,does not strike the sleeve G until it has moved a distance equal to thatwhich the lever fm has raised said sleeve. It then pushes the sleeveupward the remainder of its throw, or sufficient to pack the sand in theflask.

The rim-pattern has lugs projecting inward laterallyT from its loweredges, which rest and are secured upon the extremities of the arms 0 oradiatingfrom the upper end of the sleeve P, which surrounds the sleeveG, and is preferably a little more than half as long as sleeve G. Thissleeve P has secured longitudinally to opposite sides, intersected bythe vertical plane passing through the pillars A', the racks rr, andthese racks are engaged by the pinions R R, fast on the shafts s s. Theshafts s are journaled in the brackets t t, secured and projectinginward from the pillars A', and the other ends of said shaft, on whichare the combined friction and cog gears S, are journaled in brackets T,secured to and projecting inward from the front pillar A. The cogs ofthe gears S mesh one another. The frictionsurfaces thereof, however, areless in diameter than the cog-gear, and are alternately engaged by thefriction-pinion V on the driveshaft M. As will be inferred, in orderthat the friction-pinion may engage the frictionsurfaces of gears Salternately it must have some lateral movement. This is accomplished byjournaling the inner end of the drive-shaft eccentrically in a circularblock fv, which is itself journaled in a suitable bearingw made in thefront pillar A. The inner end of this block c is provided with twohandles y, which extend to each side horizontally, and to such distancethat they vcan be conveniently grasped. By pressing down the handle y onone side the drive-shaft is so shifted that the friction-pinion Vengages with the frictionsurface of the gear S on that side of themachine. By pressing down on the opposite handle the other gear S isengaged thereby, and by restoring the handles to a perfectly horizontalposition the friction-gear is thrown out of engagement with both gearsS.

By referring to Figs. 1 and 4 it will be seen that if the movement ofthe drive-shaft is from left to right when the friction-pinion engagesthe left-hand gear S the shaft s will so revolve as to move sleeve Pupward, and that when the right-hand gear S is engaged the reversemotion of the sleeve P results.

The power-shaft M is driven, preferably, through the medium of a largepulley on the end beyond its outer bearing, which latter is 4 soconstructed as to permit of the slight lateral oscillation of the innerend of the shaft on which the friction-pinion V is situated.

The drive-shaft is supposed to revolve all the time. As it is onlynecessary that one revolution of th'e. eccentricgears 7c and J should behad to pack the sand in the flask, the drive-shaft should impart itsmotion to the actuating-gearing thereof for but a short space of time. Itherefore make pinion N run loose on the drive-shaft and impart motionto i it by a friction-clutch 3, which has an independent longitudinalmotion on the shaft by means of a vsuitable feather, and which can bebrought into engagement with a counterpart 4, made in and integrant withthe boss of said pinion N.

IIO

If desired, the plate c may be made with-` I The operation of myinvention is substantially as follows: After the several patterns havebeen properly arranged, as hereinbefore described, the flask filled withsand, and the cover secured over the flask, the clutch 3 is shifted toengage with the counterpart 4 of the pinion N, which then slowlyrevolves the shaft K through the medium of the large gear K. As theshaft K revolves, it, through the medium of the eccentric gear lo and J,raises the shaft I in the slot h, which shaft I, directly or indirectly,'pushes the sleeve G upward. As the sleeve G moves upward it raises theplate c, the boss-pattern, and the arm-pattern upward into the flask andat the same time, through the arms Il, pushes the annulus b upward. Asthe sleeve G approaches the limit of its upward movement, the pinions Ron shafts 3 s are revolved by throwing the friction-pinion V intoengagement with the friction-surface of one of the gears S, andthepinion R, meshing with rack r fr on the sides of the sleeve P, movessaid sleeve and the rimpattern carried thereby upward until the `sleeveG reaches the limit of its upward moveshaft K has completed onerevolution, the

clutch 3 is disengaged from the pinion N, thus stopping the machine. Thecover of the flask is then loosened and the flask lifted bodily from theplate B and ring C and disposed of in the usual manner common infoundries to make a complete mold.

What I claim as new is-- l. The combination, with the iiask D, cover F,and rim-pattern a, of the vertically-movable plate c, sleeve G, post g,having a slot 'h therein, vertically-moving shaft I, eccentricgears J onthe ends thereof, shaft K, and eccentric-gears thereon engaging withsaid eccentrics J, as set forth.

2. The combination, with the flask D and cover F, of the plate c, sleeveG, having a basal flange G', post g, having a slot h therein,vertically-movin g shaft I, eccentric-gears J on the ends thereof, shaftK, eccentricgears k thereon, which engage gears J, and lever m, suitablyfulcrumed about midway its length and having its inner end bifurcated soas to support said sleeve on either side of said post g, as set forth.

3. The combination, with the flask and cover F, of thevertically-movable rim-pattern a, arm-pattern e, and boss-pattern E,plate c, annulus b, sleeve G, arms I-I, connected to and projecting fromthe lower end of sleeve G, and supporting the annulus l) on their upperends, and post g, as set forth.

4. The combination, with the circular frame B, the ring C, iiask D, andcover F, of the annulus b, vertically-movable rim-pattern a, plate c,sleeve G, arms H, and post g, as set forth.

5. The combination, with the flask D and cover F, of plate c, sleeve G,post g, having a vertical slot h therein, vertically movable transverseshaft I, eccentric-gears J on the ends thereof, shaft K, eccentric-gears7c thereon, which engage with gears J, gear K on the forward end ofshaft K, idle-gears L L', driveshaft M, loose pinion N, and clutch onsaid drive-shaft, which engages the counterpart made integral with theboss of pinion N, as set forth.

6. The combination, with ask D, cover F, and the plate e, and sleeve Gand post g supporting the same, of the vertically-movable rim-patternce, sleeve P, supporting the rimpattern by means of arms projectingtherefrom, racks r, secured longitudinally to sleeve P diametricallyopposite each other, pinions R, engaging said racks, and shafts s, asset forth.

7. The combination, with ask D, cover F, plate c, annulus b, sleeve G,and post g, of the vertically-movable rim-pattern a, sleeve P,supporting said rim-pattern, racks r, secured longitudinally to thesleeve P, pinions R, shafts s, combined cog and friction gears S on theforward ends of shafts s, the frictional portions of which are arrangedto engage with friction-pinion V, drive-shaft M, eccentric journal vtherefor, and handle y, for operating the same so as to throw saidfriction-pinion alternately into engagement with first thefriction-surface of one gear S and then the other.

JAMES G. MGDERMOTT.

Witnesses:

FRANK D. THoMAsON, Louis S. THoMAsoN.

